classmethod tests fail with Python 3.13 (Python reverted to pre-3.9 behavior) #259
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Fixes GrahamDumpleton#259 The failures were: =================================== FAILURES =================================== _____________ TestCallingOuterClassMethod.test_class_call_function _____________ self = <test_outer_classmethod.TestCallingOuterClassMethod testMethod=test_class_call_function> def test_class_call_function(self): # Test calling classmethod. Prior to Python 3.9, the instance # and class passed to the wrapper will both be None because our # decorator is surrounded by the classmethod decorator. The # classmethod decorator doesn't bind the method and treats it # like a normal function, explicitly passing the class as the # first argument with the actual arguments following that. This # was only finally fixed in Python 3.9. For more details see: # https://bugs.python.org/issue19072 _args = (1, 2) _kwargs = {'one': 1, 'two': 2} @wrapt.decorator def _decorator(wrapped, instance, args, kwargs): if PYXY < (3, 9): self.assertEqual(instance, None) self.assertEqual(args, (Class,)+_args) else: self.assertEqual(instance, Class) self.assertEqual(args, _args) self.assertEqual(kwargs, _kwargs) self.assertEqual(wrapped.__module__, _function.__module__) self.assertEqual(wrapped.__name__, _function.__name__) return wrapped(*args, **kwargs) @_decorator def _function(*args, **kwargs): return args, kwargs class Class(object): @classmethod @_decorator def _function(cls, *args, **kwargs): return (args, kwargs) > result = Class._function(*_args, **_kwargs) tests/test_outer_classmethod.py:160: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ tests/test_outer_classmethod.py:141: in _decorator self.assertEqual(instance, Class) E AssertionError: None != <class 'test_outer_classmethod.TestCallin[54 chars]ass'> ___________ TestCallingOuterClassMethod.test_instance_call_function ____________ self = <test_outer_classmethod.TestCallingOuterClassMethod testMethod=test_instance_call_function> def test_instance_call_function(self): # Test calling classmethod via class instance. Prior to Python # 3.9, the instance and class passed to the wrapper will both be # None because our decorator is surrounded by the classmethod # decorator. The classmethod decorator doesn't bind the method # and treats it like a normal function, explicitly passing the # class as the first argument with the actual arguments # following that. This was only finally fixed in Python 3.9. For # more details see: https://bugs.python.org/issue19072 _args = (1, 2) _kwargs = {'one': 1, 'two': 2} @wrapt.decorator def _decorator(wrapped, instance, args, kwargs): if PYXY < (3, 9): self.assertEqual(instance, None) self.assertEqual(args, (Class,)+_args) else: self.assertEqual(instance, Class) self.assertEqual(args, _args) self.assertEqual(kwargs, _kwargs) self.assertEqual(wrapped.__module__, _function.__module__) self.assertEqual(wrapped.__name__, _function.__name__) return wrapped(*args, **kwargs) @_decorator def _function(*args, **kwargs): return args, kwargs class Class(object): @classmethod @_decorator def _function(cls, *args, **kwargs): return (args, kwargs) > result = Class()._function(*_args, **_kwargs) tests/test_outer_classmethod.py:202: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ tests/test_outer_classmethod.py:183: in _decorator self.assertEqual(instance, Class) E AssertionError: None != <class 'test_outer_classmethod.TestCallin[57 chars]ass'> _____________ TestSynchronized.test_synchronized_outer_classmethod _____________ self = <test_synchronized_lock.TestSynchronized testMethod=test_synchronized_outer_classmethod> def test_synchronized_outer_classmethod(self): # Prior to Python 3.9 this isn't detected as a class method # call, as the classmethod decorator doesn't bind the wrapped # function to the class before calling and just calls it direct, # explicitly passing the class as first argument. For more # details see: https://bugs.python.org/issue19072 if PYXY < (3, 9): _lock0 = getattr(C4.function2, '_synchronized_lock', None) else: _lock0 = getattr(C4, '_synchronized_lock', None) self.assertEqual(_lock0, None) c4.function2() if PYXY < (3, 9): _lock1 = getattr(C4.function2, '_synchronized_lock', None) else: _lock1 = getattr(C4, '_synchronized_lock', None) > self.assertNotEqual(_lock1, None) E AssertionError: None == None tests/test_synchronized_lock.py:181: AssertionError ----------------------------- Captured stdout call ----------------------------- function2 =========================== short test summary info ============================ FAILED tests/test_outer_classmethod.py::TestCallingOuterClassMethod::test_class_call_function FAILED tests/test_outer_classmethod.py::TestCallingOuterClassMethod::test_instance_call_function FAILED tests/test_synchronized_lock.py::TestSynchronized::test_synchronized_outer_classmethod ======================== 3 failed, 435 passed in 0.83s ========================= To fix the same failures on Python 3.9, they were adjusted in the past. For details see GrahamDumpleton#160 However, Python 3.13 reverted the change from 3.9, so this adds an upper bound for the conditionals. To make the conditionals easier to read, the if-else branches were switched.
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Similarily to #160 the tests now fail with Python 3.13.0a4.
To reproduce, I did:
I did not understand the error, so I changed:
And continued:
When searching the issues here, I found #160 which looks very similar, if not the same.
So I searched https://docs.python.org/3.13/whatsnew/3.13.html for "classmethod" and found:
The text was updated successfully, but these errors were encountered: